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It is an important area for wildlife, particularly with the major reserve at Monfragüe, which was designated a National Park in 2007, and the International Tagus River Natural Park (Parque Natural Tajo Internacional). The government of Extremadura is called Gobierno de Extremadura.

The Day of Extremadura is celebrated on 8 September. It coincides with the Catholic festivity of Our Lady of Guadalupe.

The basin of the Tagus (Spanish: Tajo), with two principal tributaries: on the right, the Tiétar and the Alagón; and on the left, the Almonte, Ibor, Salor and the Sever. The tributaries on the right edge carry a large quantity of water, which feed the gorges of the Sistema Central where the rainfall is abundant and the winter brings a great quantity of snow.

The yearly temperature fluctuates between an average minimum of 4 °C (39 °F) and an average maximum of 33 °C (91 °F). In the north of Extremadura, the average temperatures are lower than those in the south, with temperatures gradually rising south towards the Sierra Morena, where they drop because of the altitude.

During the summer, the average temperature in July is greater than 26 °C (79 °F), at times reaching 40 °C (104 °F).

The winters are mild, with the lowest temperatures being registered in the mountainous regions, with an average temperature of 7.5 °C (45 °F).

The average snowfall is 40 cm (16 in), mainly occurring in January and February on high ground.

As of January 1, 2012, the population of Extremadura is 1,109,367 inhabitants, representing 2.36% of the Spanish population (46,745,807).

The population density is very low—25/km2 (65/sq mi)—compared to Spain as a whole.

The most populous province is that of Badajoz, with a population of 691,715 and a population density of 31.78/km2 (82.3/sq mi). With an area of 21,766 km2 (8,404 sq mi), it is the largest province in Spain. 413,766 people live in the province of Cáceres at a density of 20.83/km2 (53.9/sq mi), having an area of 19,868 km2 (7,671 sq mi), making it the largest province in Spain after Badajoz.

Within the region of Extremadura, there live 29,068 foreign citizens, according to the INE census of January 1, 2007, of which 16,647 reside in the province of Badajoz and 12,421 in the province of Cáceres.

The largest immigrant community is Moroccan with 9,218 people, followed by Romanians with 4,324. There are 98 Icelanders and 6 Liechtensteiners. Brazilians account for 1,676 and Colombians make up 1,409. Of immigrants from Sub-Saharan Africa, the largest community is Senegalese with 88 people. Of those from Asia, the Chinese make up the largest group with 631 people. There are also 3,492 Portuguese people living within the region.

The Extremaduran population, according to the 1591 census of the provinces of the Kingdom of Castile, was around 540,000 people, making up 8% of the total population of Spain. No other census was performed until 1717, when 326,358 people were counted as living in Extremadura.

From this period, the population grew steadily until the 1960s (1,379,072 people in 1960[4]). After 1960, emigration to more prosperous regions of Spain and Europe drained the population.

Lusitania, an ancient Roman province approximately including current day Portugal (except for the northern area today known as Norte Region) and a central western portion of the current day Spain, covered in those times today's Autonomous Community of Extremadura. Mérida (now capital of Extremadura) became the capital of the Roman province of Lusitania, and one of the most important cities in the Roman Empire.

During the Andalusian period as of 711, present-day Extremadura was on the north-western marches—extremadura is from Latin words meaning literally "outermost hard", the outermost secure border (the march) of an occupied territory—with Mérida being its head city. It was part of the Umayyad Caliphate of Córdoba, but after its definite collapse in 1031 the Caliphate fragmented into small regional kingdoms, and the lands of Extremadura were included in the Taifa of Badajoz on two taifa periods. The kingdom in turn broke up twice under Almoravid and Almohad push (1094 and 1151). After the Almohad disaster in Navas de Tolosa (1212), Extremadura fell to the troops led by Alfonso IX of León in c.1230.

Wild Black Iberian pigs roam in the area and consume acorns from oak groves. These pigs are caught and used for the cured ham dish jamón ibérico. The higher the percentage of acorns eaten by the pigs, the more valuable the ham. For example, jamón ibérico from pigs whose diet consists of 90% acorns or more can be sold for more than twice as much as ham whose pigs ate on average less than 70% acorns.[citation needed] In the US, jamón ibérico directly from Extremadura, with bone, was illegal until around 2005. At that time, enough US restaurants were in demand for the delicacy that Spain decided to export it as boneless, which the US Department of Agriculture's health codes would approve (and continue to do).[citation needed]

1.
Autonomous communities of Spain
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Spain is not a federation, but a highly decentralized unitary state. Some scholars have referred to the system as a federal system in all. There are 17 autonomous communities and two cities that are collectively known as autonomies. The two autonomous cities have the right to become autonomous communities, but neither has yet used this right and this unique framework of territorial administration is known as the State of Autonomies. The autonomous communities are governed according to the constitution and their own organic laws known as Statutes of Autonomy, since devolution was intended to be asymmetrical in nature, the scope of competences vary for each community, but all have the same parliamentary structure. Spain is a country made up of different regions with varying economic and social structures, as well as different languages. While the entire Spanish territory was united under one crown by the 16th century, the constituent territories—be it crowns, kingdoms, principalities or dominions—retained much of their former institutional existence, including limited legislative, judicial or fiscal autonomy. These territories also exhibited a variety of customs, laws. From the 18th century onwards, the Bourbon kings and the government tried to establish a more centralized regime, leading figures of the Spanish Enlightenment advocated for the building of a Spanish nation beyond the internal territorial boundaries. This culminated in 1833, when Spain was divided into 49 provinces and these were the Basque Country and Catalonia. This gave rise to peripheral nationalisms along with Spanish nationalism, therefore, economic and social changes that had produced a national cultural unification in France had the opposite effect in Spain. In a response to Catalan demands, limited autonomy was granted to Catalonia in 1913 and it was granted again in 1932 during the Second Spanish Republic, when the Generalitat, Catalonias mediaeval institution of government, was restored. During General Francos dictatorial regime, centralism was most forcefully enforced as a way of preserving the unity of the Spanish nation, peripheral nationalism, along with communism and atheism were regarded by his regime as the main threats. When Franco died in 1975, Spain entered into a phase of transition towards democracy, the then Prime Minister of Spain, Adolfo Suárez, met with Josep Tarradellas, president of the Generalitat of Catalonia in exile. An agreement was made so that the Generalitat would be restored and limited competencies would be transferred while the constitution was still being written. In the end, the constitution, published and ratified in 1979, found a balance in recognizing the existence of nationalities and regions in Spain, within the indissoluble unity of the Spanish nation. The starting point in the organization of Spain was the second article of the constitution. In order to exercise this right, the established a open process whereby the nationalities

2.
Spain
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By population, Spain is the sixth largest in Europe and the fifth in the European Union. Spains capital and largest city is Madrid, other urban areas include Barcelona, Valencia, Seville, Bilbao. Modern humans first arrived in the Iberian Peninsula around 35,000 years ago, in the Middle Ages, the area was conquered by Germanic tribes and later by the Moors. Spain is a democracy organised in the form of a government under a constitutional monarchy. It is a power and a major developed country with the worlds fourteenth largest economy by nominal GDP. Jesús Luis Cunchillos argues that the root of the span is the Phoenician word spy. Therefore, i-spn-ya would mean the land where metals are forged, two 15th-century Spanish Jewish scholars, Don Isaac Abravanel and Solomon ibn Verga, gave an explanation now considered folkloric. Both men wrote in two different published works that the first Jews to reach Spain were brought by ship by Phiros who was confederate with the king of Babylon when he laid siege to Jerusalem. This man was a Grecian by birth, but who had given a kingdom in Spain. He became related by marriage to Espan, the nephew of king Heracles, Heracles later renounced his throne in preference for his native Greece, leaving his kingdom to his nephew, Espan, from whom the country of España took its name. Based upon their testimonies, this eponym would have already been in use in Spain by c.350 BCE, Iberia enters written records as a land populated largely by the Iberians, Basques and Celts. Early on its coastal areas were settled by Phoenicians who founded Western Europe´s most ancient cities Cadiz, Phoenician influence expanded as much of the Peninsula was eventually incorporated into the Carthaginian Empire, becoming a major theater of the Punic Wars against the expanding Roman Empire. After an arduous conquest, the peninsula came fully under Roman Rule, during the early Middle Ages it came under Germanic rule but later, much of it was conquered by Moorish invaders from North Africa. In a process took centuries, the small Christian kingdoms in the north gradually regained control of the peninsula. The last Moorish kingdom fell in the same year Columbus reached the Americas, a global empire began which saw Spain become the strongest kingdom in Europe, the leading world power for a century and a half, and the largest overseas empire for three centuries. Continued wars and other problems led to a diminished status. The Napoleonic invasions of Spain led to chaos, triggering independence movements that tore apart most of the empire, eventually democracy was peacefully restored in the form of a parliamentary constitutional monarchy. Spain joined the European Union, experiencing a renaissance and steady economic growth

3.
Spanish Socialist Workers' Party
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The Spanish Socialist Workers Party, is a social-democratic political party in Spain. PSOE formed the government in democratic Spain between 1982 and 1996, and between 2004 and 2011 and it is the currently the oldest political party in Spanish history. The party, under Felipe González, formed a majority government after its victory in the 1982 general election, the party then formed a minority government until 1996. PSOE has had ties with the General Union of Workers. For decades, UGT membership was a requirement for PSOE membership, however, since the 1980s, UGT has frequently criticized the economic policies of PSOE, even calling for a general strike on 14 December 1988. PSOE was last in power between 2004 and 2011 general elections, with José Luis Rodríguez Zapatero serving as leader of the government, the PSOE is a member of the Party of European Socialists, Progressive Alliance and the Socialist International. In the European Parliament, PSOEs 14 Members of the European Parliament sit in the Socialists and Democrats European parliamentary group, PSOE was founded with the purpose of representing and defending the interests of the working class formed during the Industrial Revolution in the 19th century. The ideology of the Spanish Socialist Workers Party has evolved throughout the 20th Century according to relevant historical events and this allowed for the consolidation of the leftist forces in PSOE. Currently, PSOE defines itself as democratic, center-left and progressive. Concerning the territorial model of the realm, PSOE supports asymmetric federalism and it is grouped with other self-styled socialists, social democrats and labour parties in the Party of European Socialists. PSOE was founded on the 2nd of May,1879 in the Casa Labra Pub by the historical Spanish workers leader Pablo Iglesias, the first program of the new political party was passed in an assembly of 40 people, on 20 July of that same year. The party was a member of the Labour and Socialist International between 1923 and 1940, PSOE formed part of the Spanish Government during the Second Spanish Republic and as part of the Spanish Popular Front, elected to government in February 1936. The dictator Francisco Franco banned PSOE in 1939, and the party was legalized again in 1977, during Francos rule members of PSOE were persecuted, with many leaders, members and supporters being imprisoned or exiled and even executed. Its 25th Congress was held in Toulouse in August 1972, in 1974 at its 26th Congress in Suresnes, Felipe González was elected Secretary General, replacing Rodolfo Llopis Ferrándiz. González was from the wing of the party, and his victory signaled a defeat for the historic. The direction of the party shifted from the exiles to the people in Spain who hadnt fought the war. Their standing was further boosted in 1978 when the 6 deputies of the Popular Socialist Party agreed to merge with the party, in their 27th congress in May 1979, González resigned because the party would not abandon its Marxist character. In September of that year, the extraordinary 28th congress was called in which González was re-elected when the party agreed to move away from Marxism, European social-democratic parties supported Gonzálezs stand, and the Social Democratic Party of Germany granted them money

4.
Iberian Peninsula
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The Iberian Peninsula /aɪˈbɪəriən pəˈnɪnsjᵿlə/, also known as Iberia /aɪˈbɪəriə/, is located in the southwest corner of Europe. The peninsula is divided between Portugal and Spain, comprising most of their territory. With an area of approximately 582,000 km2, it is the second largest European peninsula, at that time, the name did not describe a single political entity or a distinct population of people. Strabos Iberia was delineated from Keltikē by the Pyrenees and included the land mass southwest of there. The ancient Greeks reached the Iberian Peninsula, of which they had heard from the Phoenicians, hecataeus of Miletus was the first known to use the term Iberia, which he wrote about circa 500 BC. Herodotus of Halicarnassus says of the Phocaeans that it was they who made the Greeks acquainted with. According to Strabo, prior historians used Iberia to mean the country side of the Ἶβηρος as far north as the river Rhône in France. Polybius respects that limit, but identifies Iberia as the Mediterranean side as far south as Gibraltar, elsewhere he says that Saguntum is on the seaward foot of the range of hills connecting Iberia and Celtiberia. Strabo refers to the Carretanians as people of the Iberian stock living in the Pyrenees, according to Charles Ebel, the ancient sources in both Latin and Greek use Hispania and Hiberia as synonyms. The confusion of the words was because of an overlapping in political, the Latin word Hiberia, similar to the Greek Iberia, literally translates to land of the Hiberians. This word was derived from the river Ebro, which the Romans called Hiberus, hiber was thus used as a term for peoples living near the river Ebro. The first mention in Roman literature was by the annalist poet Ennius in 200 BC. Virgil refers to the Ipacatos Hiberos in his Georgics, the Roman geographers and other prose writers from the time of the late Roman Republic called the entire peninsula Hispania. As they became interested in the former Carthaginian territories, the Romans began to use the names Hispania Citerior. At the time Hispania was made up of three Roman provinces, Hispania Baetica, Hispania Tarraconensis, and Lusitania, Strabo says that the Romans use Hispania and Iberia synonymously, distinguishing between the near northern and the far southern provinces. Whatever language may generally have been spoken on the peninsula soon gave way to Latin, except for that of the Vascones, the Iberian Peninsula has always been associated with the Ebro, Ibēros in ancient Greek and Ibērus or Hibērus in Latin. The association was so known it was hardly necessary to state, for example. Pliny goes so far as to assert that the Greeks had called the whole of Spain Hiberia because of the Hiberus River, the river appears in the Ebro Treaty of 226 BC between Rome and Carthage, setting the limit of Carthaginian interest at the Ebro. The fullest description of the treaty, stated in Appian, uses Ibērus, with reference to this border, Polybius states that the native name is Ibēr, apparently the original word, stripped of its Greek or Latin -os or -us termination

5.
Castilla-La Mancha
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Castilla-La Mancha is a south-western European region that was part of the Kingdom of Castile. Nowadays it is established as a community of Spain. Castilla-La Mancha is bordered by Castile and León, Madrid, Aragon, Valencia, Murcia, Andalusia and it is one of the most sparsely populated of Spains autonomous communities. Albacete is the largest and most populous city and its capital city is Toledo, and its judicial capital city is Albacete. It is mostly in this region where the story of the famous Spanish novel Don Quixote by Miguel de Cervantes is situated, due to which La Mancha is internationally well-known. Although La Mancha is a windswept, battered plateau, it remains a symbol of Spanish culture with its vineyards, sunflowers, mushrooms, olive plantations, windmills, Manchego cheese, the history of Castilla-La Mancha has been significant. Its origin lay in the Muslim period between the 8th and 14th century, Castilla-La Mancha was the region of many historical battles between Christian crusaders and Muslim forces during the period from 1000 to the 13th century. It was also the region where the Crown of Castile and Aragon were unified in 1492 under Queen Isabel, Castilla-La Mancha is the successor to New Castile, which in turn traces back to the Muslim Taifa of Toledo, one of the taifas of Al Andalus. Alfonso VI conquered the region from the Muslims, taking Toledo in 1085, the Reconquista took Cuenca in 1177. That victory assured Castilian domination of the region and hastened the decline of the Almohad Dynasty, from the time of the Reconquista, Castilla-La Mancha formed part of the Kingdom of Castile. Four centuries later, in 1605, Cervantes Don Quixote gave the world a picture of La Mancha. In 1785, the organization by the reformer Floridablanca divided the region into the provinces of Cuenca, Guadalajara, Madrid, La Mancha. Albacete, Chinchilla, Almansa, Hellín and Yeste, however, Albacete, in turn, also incorporated parts of the territories of the old provinces of Cuenca and Murcia. Albacete was administered as part of the Region of Murcia until the 1978 configuration of autonomous regions, the Autonomous Community of Castilla-La Mancha dates from November 15,1978, as one of the many autonomous regions defined by the Spanish central government. The new, hyphenated name constituted an effort to two distinct regionalisms, that of the larger Castilla and that of the smaller onetime province of La Mancha. The Statute of Autonomy of Castilla–La Mancha was approved August 10,1982, Castilla-La Mancha is divided into 5 provinces named after their capital cities. 496 of these have less than 500 inhabitants,231 have between 501 and 2,000 inhabitants,157 between 2,000 and 10,000 inhabitants, and only 35 have more than 10,000 inhabitants. The municipalities in the north are small and numerous, while in the south they are larger and fewer and this reflects different histories of how these sub-regions were repopulated during the Reconquista

6.
Andalusia
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Andalusia is an autonomous community in southern Spain. It is the most populated and the second largest in area of the communities in the country. The Andalusian autonomous community is recognised as historical nationality. The territory is divided into eight provinces, Almería, Cádiz, Córdoba, Granada, Huelva, Jaén, Málaga and its capital is the city of Seville. Andalusia is the only European region with both Mediterranean and Atlantic coastlines, the small British overseas territory of Gibraltar shares a three-quarter-mile land border with the Andalusian province of Cádiz at the eastern end of the Strait of Gibraltar. The main mountain ranges of Andalusia are the Sierra Morena and the Baetic System, consisting of the Subbaetic and Penibaetic Mountains, in the north, the Sierra Morena separates Andalusia from the plains of Extremadura and Castile–La Mancha on Spains Meseta Central. To the south the geographic subregion of Upper Andalusia lies mostly within the Baetic System, the name Andalusia is derived from the Arabic word Al-Andalus. Including an intense relationship with Naples, Italy, Andalusia has been a traditionally agricultural region, compared to the rest of Spain and the rest of Europe. However, the growth of the community especially in the sectors of industry and services was above average in Spain, the region has, however, a rich culture and a strong cultural identity. Many cultural phenomena that are seen internationally as distinctively Spanish are largely or entirely Andalusian in origin and these include flamenco and, to a lesser extent, bullfighting and Hispano-Moorish architectural styles. Andalusias hinterland is the hottest area of Europe, with cities like Córdoba, Late evening temperatures can sometimes stay around 35 °C until close to midnight, with daytime highs of over 40 °C common. Seville also has the highest average temperature in mainland Spain and mainland Europe. Its present form is derived from the Arabic name for Muslim Iberia. However, the etymology of the name Al-Andalus is disputed, the Spanish place name Andalucía was introduced into the Spanish languages in the 13th century under the form el Andalucía. This was a Castilianization of Al-Andalusiya, the form of the Arabic language al-Andalus. The etymology of al-Andalus is itself somewhat debated, but in fact it entered the Arabic language before this came under Muslim rule. Like the Arabic term al-Andalus, in historical contexts the Spanish term Andalucía or the English term Andalusia do not necessarily refer to the territory designated by these terms today. To designate the territories the Christians had regained by that time in the Guadalquivir valley and in the Kingdoms of Granada, in a document from 1253, Alfonso X styled himself Rey de Castilla, León y de toda Andalucía

7.
Portugal
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Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. It is the westernmost country of mainland Europe, to the west and south it is bordered by the Atlantic Ocean and to the east and north by Spain. The Portugal–Spain border is 1,214 kilometres long and considered the longest uninterrupted border within the European Union, the republic also includes the Atlantic archipelagos of the Azores and Madeira, both autonomous regions with their own regional governments. The territory of modern Portugal has been settled, invaded. The Pre-Celts, Celts, Carthaginians and the Romans were followed by the invasions of the Visigothic, in 711 the Iberian Peninsula was invaded by the Moors, making Portugal part of Muslim Al Andalus. Portugal was born as result of the Christian Reconquista, and in 1139, Afonso Henriques was proclaimed King of Portugal, in the 15th and 16th centuries, Portugal established the first global empire, becoming one of the worlds major economic, political and military powers. Portugal monopolized the trade during this time, and the Portuguese Empire expanded with military campaigns led in Asia. After the 1910 revolution deposed the monarchy, the democratic but unstable Portuguese First Republic was established, democracy was restored after the Portuguese Colonial War and the Carnation Revolution in 1974. Shortly after, independence was granted to almost all its overseas territories, Portugal has left a profound cultural and architectural influence across the globe and a legacy of over 250 million Portuguese speakers today. Portugal is a country with a high-income advanced economy and a high living standard. It is the 5th most peaceful country in the world, maintaining a unitary semi-presidential republican form of government and it has the 18th highest Social Progress in the world, putting it ahead of other Western European countries like France, Spain and Italy. Portugal is a pioneer when it comes to drug decriminalization, as the nation decriminalized the possession of all drugs for use in 2001. The early history of Portugal is shared with the rest of the Iberian Peninsula located in South Western Europe, the name of Portugal derives from the joined Romano-Celtic name Portus Cale. Other influences include some 5th-century vestiges of Alan settlements, which were found in Alenquer, Coimbra, the region of present-day Portugal was inhabited by Neanderthals and then by Homo sapiens, who roamed the border-less region of the northern Iberian peninsula. These were subsistence societies that, although they did not establish prosperous settlements, neolithic Portugal experimented with domestication of herding animals, the raising of some cereal crops and fluvial or marine fishing. Chief among these tribes were the Calaicians or Gallaeci of Northern Portugal, the Lusitanians of central Portugal, the Celtici of Alentejo, a few small, semi-permanent, commercial coastal settlements were also founded in the Algarve region by Phoenicians-Carthaginians. Romans first invaded the Iberian Peninsula in 219 BC, during the last days of Julius Caesar, almost the entire peninsula had been annexed to the Roman Republic. The Carthaginians, Romes adversary in the Punic Wars, were expelled from their coastal colonies and it suffered a severe setback in 150 BC, when a rebellion began in the north

8.
Sistema Central
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The Central System, Spanish and Portuguese, Sistema Central, is one of the main systems of mountain ranges in the Iberian Peninsula. 2,592 m high Pico Almanzor is its highest summit, the Central System is located just north of the 40th parallel and its ranges divide the drainage basin of the Tagus from the basin of the Douro. The Sistema Central is a feature of the Meseta Central. Unlike the neighboring Sistema Ibérico, the Sistema Central range is a homogeneous system. It consists of ranges that formed 25 million years ago as part of the Alpine orogeny.993 m. Other notably large ranges are Sierra de Gata and Sierra de Ayllón, the Central System links with the Sistema Ibérico at its eastern end through the Sierra de Pela, the Altos de Barahona and Sierra Ministra, the latter already fully part of the Iberian System. Sistema Central is a widely known academic geographical term, local inhabitants, however, generally refer to the Sistema Central by the names of its smaller constituent ranges. The main ranges of the Sistema Central from west to east followed by their highest points are, Serra da Lousã, Serra do Moradal Serra da Estrela, Torre,1,993 m. Sierra de Gata, Jálama,1,492 m, Sierra de la Canchera, Pico Tiendas,1,590 m Sierra de Francia, Pico de la Hastiala,1,735 m. Sierra de Béjar, Canchal de la Ceja,2,430 m, Sierra de Gredos, Pico Almanzor,2,592 m. Sierra de la Horcajada, Risco de la Umbrela,1,562 m, Sierra de Villafranca, Cerro Moros,2,059 m. Sierra de Piedra Aguda, Piedra Aguda,1,817 m, La Serrota, Cerro del Santo,2,294 m. Sierra de Hoyocasero, Navasolana,1,708 m, Sierra de la Paramera, Pico Zapatero,2,160 m. Sierra de Ávila, Cerro de Gorría,1,708 m, Sierra de Ojos Albos, Cruz de Hierro,1,657 m. Sierra de Malagón, Cueva Valiente,1,903 m, Sierra de San Vicente, Cruces,1,373 m. Sierra de Guadarrama, Peñalara,2,428 m, La Mujer Muerta, La Pinareja,2,197 m. Siete Picos, Siete Picos,2,138 m, cuerda Larga, Cabeza de Hierro Mayor,2,383 m. Sierra de la Morcuera, La Najarra,2,122 m, Sierra de Canencia, Mondalindo,1,831 m

9.
Tagus
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The Tagus is the longest river in the Iberian Peninsula. It is 1,007 km long,716 km in Spain,47 km along the border between Portugal and Spain and 275 km in Portugal, where it empties into the Atlantic Ocean near Lisbon and it drains an area of 80,100 square kilometers. The Tagus is highly utilized for most of its course, several dams and diversions supply drinking water to most of central Spain, including Madrid, and Portugal, while dozens of hydroelectric stations create power. Between dams it follows a very constricted course, but after Almourol it enters a vast alluvial valley prone to flooding, at its mouth is a large estuary on which the port city of Lisbon is situated. The source of the Tagus is the Fuente de García, in the Frías de Albarracín municipal term, Montes Universales, Sistema Ibérico, all its major tributaries enter the Tagus from the right bank. The main cities it passes through are Aranjuez, Toledo, Talavera de la Reina and Alcántara in Spain, the first notable city on the Tagus is Sacedón. Below Aranjuez it receives the flow of the Jarama, Henares, Algodor. Below Toledo it receives the Guadarrama River, above Talavera de la Reina it receives the Alberche. There is a canal and aqueduct between the Tagus and the Segura, the estuary is protected by the Tagus Estuary Natural Reserve. There is the largest bridge across the river, the Vasco da Gama Bridge, the Port of Lisbon, located at its mouth, is one of Europes busiest. The lower Tagus is on a fault line, slippage along it has caused numerous earthquakes, the major ones being those of 1309,1531 and 1755. The Pepper Wreck, properly the wreck of the Nossa Senhora dos Mártires, is a shipwreck located and excavated at the mouth of the Tagus between 1996 and 2001, the river had strategic value to the Spanish and Portuguese empires, as it guarded the approach to Lisbon. For example, in 1587, Sir Francis Drake briefly approached the river after his raid at Cadiz. A major river, the Tagus is brought to mind in the songs, a popular fado song in Lisbon notes that while people get older, the Tagus remains young. The author, Fernando Pessoa, wrote a poem that begins, but the Tagus is not more beautiful than the river that flows through my village. Richard Crashaws poem Saint Mary Magdalene, or the Weeper refers to the Golden Tagus as wanting Mary Magdalenes silver tears, in classical poetry the Tagus was famous for its gold-bearing sands. List of rivers of Spain List of rivers of Portugal

10.
Congress of Deputies (Spain)
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The Congress of Deputies of Spain, commonly referred to as simply the Congress of Deputies is the lower house of the Cortes Generales, Spains legislative branch. It is located in the Palace of the Parliament and it has 350 members elected by constituencies by proportional representation using the DHondt method. The President of the Congress of Deputies is the analogue to a speaker, in the Congress, members of the Parliament from the political parties, or groups of parties, form parliamentary groups. The MPs belonging to parties who cannot create their own parliamentary group form the Mixed Group, the Spanish Constitution establishes in the Article 68.1 that the Congress of Deputies must be composed of among 300 deputies at least and 400 deputies at most. At present, the chamber has 350 deputies which is determinated by the General Electoral Regim Organic Law, the Spanish Constitution establishes that the deputies are chosen by universal, free, equal, direct and secret suffrage. The Election is held four years or before in case of snap election. The members of the Congress are elected by proportional representation with closed lists in each constituency, there are 52 polynominal constituencies for the Congress of Deputies which belong to the 50 provinces of Spain and the two autonomous cities. According to the Spanish Electoral Law, each province must elect two deputies at least, the two autonomous cities can only elect one each. In this way, there are 102 deputies already elected, the other 248 deputies are allocated proportionally to the citizenships. This distribution can change a bit in each election and it is specified in the Royal Decree Calling Elections, after the General Election, seats are assigned to the electoral lists in each constituency. For this distribution it is used the DHondt method in each constituency separately and this system guarantees that any elected candidate has got less votes than a non-elected candidate in that constituency. Moreover, there is a threshold of 3% that is to say that a political party needs the 3% of the valid votes emitted in its constituency at least to aim for the seats distribution. The last item is only applied in the provinces which elect 24 deputies at least, at present, this condition is only fulfilled by Madrid and Barcelona. 0. 1% of signatures of the register in each constituency are needed. Each citizen can only sign once for each candidacy, the Electoral Board will establish the details of the collection of signatures. Likewise, the most populated provinces are underrepresented and this system tends to favour the biggest political parties. In spite of using a representation system, the electoral system of the Congress of Deputies favours the creation of a two-party system. It is due to different reasons such as, The large disparity of population between the provinces, despite the smaller provinces are overrepresented, the number of deputies assigned to each one is small and tends to go to the two main parties